26 #if !defined(_SPANDSP_PRIVATE_V27TER_RX_H_) 27 #define _SPANDSP_PRIVATE_V27TER_RX_H_ 32 #define V27TER_EQUALIZER_LEN 32 34 #define V27TER_EQUALIZER_PRE_LEN 16 37 #define V27TER_RX_4800_FILTER_STEPS 27 39 #define V27TER_RX_2400_FILTER_STEPS 27 41 #if V27TER_RX_4800_FILTER_STEPS > V27TER_RX_2400_FILTER_STEPS 42 #define V27TER_RX_FILTER_STEPS V27TER_RX_4800_FILTER_STEPS 44 #define V27TER_RX_FILTER_STEPS V27TER_RX_2400_FILTER_STEPS 72 #if defined(SPANDSP_USE_FIXED_POINT) qam_report_handler_t qam_report
A callback function which may be enabled to report every symbol's constellation position.
Definition: private/v27ter_rx.h:67
complexf_t eq_buf[32]
The equalizer signal buffer.
Definition: private/v27ter_rx.h:110
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition: private/v27ter_rx.h:63
put_bit_func_t put_bit
The callback function used to put each bit received.
Definition: private/v27ter_rx.h:56
int constellation_state
The position of the current symbol in the constellation, used for differential decoding.
Definition: private/v27ter_rx.h:152
int32_t diff_angles[16]
History list of phase angle differences for the coarse carrier aquisition step.
Definition: private/v27ter_rx.h:189
int32_t last_angles[2]
The previous symbol phase angles for the coarse carrier aquisition step.
Definition: private/v27ter_rx.h:187
complexf_t eq_coeff[32]
The adaptive equalizer coefficients.
Definition: private/v27ter_rx.h:106
int old_train
TRUE if the previous trained values are to be reused.
Definition: private/v27ter_rx.h:134
power_meter_t power
A power meter, to measure the HPF'ed signal power in the channel.
Definition: private/v27ter_rx.h:162
int training_stage
The section of the training data we are currently in.
Definition: private/v27ter_rx.h:136
int training_count
A count of how far through the current training step we are.
Definition: private/v27ter_rx.h:138
int total_baud_timing_correction
The total symbol timing correction since the carrier came up. This is only for performance analysis p...
Definition: private/v27ter_rx.h:184
int eq_put_step
Current write offset into the equalizer buffer.
Definition: private/v27ter_rx.h:171
float training_error
A measure of how much mismatch there is between the real constellation, and the decoded symbol positi...
Definition: private/v27ter_rx.h:114
void(* put_bit_func_t)(void *user_data, int bit)
Definition: async.h:105
int16_t last_sample
The value of the last signal sample, using the a simple HPF for signal power estimation.
Definition: private/v27ter_rx.h:140
void(* modem_status_func_t)(void *user_data, int status)
Definition: async.h:114
int bit_rate
The bit rate of the modem. Valid values are 2400 and 4800.
Definition: private/v27ter_rx.h:54
int gardner_step
Current step size of Gardner algorithm integration.
Definition: private/v27ter_rx.h:181
complexf_t eq_coeff_save[32]
A saved set of adaptive equalizer coefficients for use after restarts.
Definition: private/v27ter_rx.h:108
int eq_step
Current read offset into the equalizer buffer.
Definition: private/v27ter_rx.h:169
int gardner_integrate
Integration variable for damping the Gardner algorithm tests.
Definition: private/v27ter_rx.h:179
int32_t carrier_phase_rate
The update rate for the phase of the carrier (i.e. the DDS increment).
Definition: private/v27ter_rx.h:157
int16_t high_sample
A highest magnitude sample seen.
Definition: private/v27ter_rx.h:148
int training_bc
The current step in the table of BC constellation positions.
Definition: private/v27ter_rx.h:132
uint32_t scramble_reg
The register for the training and data scrambler.
Definition: private/v27ter_rx.h:127
int eq_skip
Symbol counter to the next equalizer update.
Definition: private/v27ter_rx.h:173
float agc_scaling
The scaling factor assessed by the AGC algorithm.
Definition: private/v27ter_rx.h:99
void * qam_user_data
A user specified opaque pointer passed to the qam_report callback routine.
Definition: private/v27ter_rx.h:70
float eq_delta
The current delta factor for updating the equalizer coefficients.
Definition: private/v27ter_rx.h:104
int32_t carrier_phase_rate_save
The carrier update rate saved for reuse when using short training.
Definition: private/v27ter_rx.h:159
float rrc_filter[27]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition: private/v27ter_rx.h:121
int low_samples
A count of the current consecutive samples below the carrier off threshold.
Definition: private/v27ter_rx.h:146
uint32_t carrier_phase
The current phase of the carrier (i.e. the DDS parameter).
Definition: private/v27ter_rx.h:155
Definition: private/logging.h:33
float carrier_track_i
The integral part of the carrier tracking filter.
Definition: private/v27ter_rx.h:119
int32_t carrier_on_power
The power meter level at which carrier on is declared.
Definition: private/v27ter_rx.h:164
float carrier_track_p
The proportional part of the carrier tracking filter.
Definition: private/v27ter_rx.h:117
Definition: private/v27ter_rx.h:51
int signal_present
>0 if a signal above the minimum is present. It may or may not be a V.27ter signal.
Definition: private/v27ter_rx.h:142
int32_t carrier_off_power
The power meter level at which carrier off is declared.
Definition: private/v27ter_rx.h:166
float agc_scaling_save
The previous value of agc_scaling, needed to reuse old training.
Definition: private/v27ter_rx.h:101
int baud_half
The current half of the baud.
Definition: private/v27ter_rx.h:176
Definition: power_meter.h:48
modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition: private/v27ter_rx.h:61
logging_state_t logging
Error and flow logging control.
Definition: private/v27ter_rx.h:192
int carrier_drop_pending
Whether or not a carrier drop was detected and the signal delivery is pending.
Definition: private/v27ter_rx.h:144
int scrambler_pattern_count
A counter for the number of consecutive bits of repeating pattern through the scrambler.
Definition: private/v27ter_rx.h:130
void * put_bit_user_data
A user specified opaque pointer passed to the put_bit routine.
Definition: private/v27ter_rx.h:58
int rrc_filter_step
Current offset into the RRC pulse shaping filter buffer.
Definition: private/v27ter_rx.h:124